*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Reference:
+ * https://github.com/json-c/json-c/blob/master/linkhash.c
+ * https://github.com/json-c/json-c/blob/master/linkhash.h
*/
#include <time.h>
#include <sys/stat.h>
#include <sys/types.h>
+#include <pthread.h>
+#include <search.h>
+
#define AFB_SESSION_JTYPE "AFB_session"
#define AFB_SESSION_JLIST "AFB_sessions"
#define AFB_SESSION_JINFO "AFB_infos"
+
#define AFB_CURRENT_SESSION "active-session" // file link name within sndcard dir
#define AFB_DEFAULT_SESSION "current-session" // should be in sync with UI
-
-
+static pthread_mutex_t mutexHash; // declare a mutex to protect hash table
+static struct hsearch_data sessions = {0}; // Create an empty hash table for sessions
// verify we can read/write in session dir
PUBLIC AFB_error sessionCheckdir (AFB_session *session) {
// do we have extra session info ?
- if (request->post) {
+ if (request->post->type == AFB_POST_JSON) {
static json_object *info, *jtype;
const char *ajglabel;
// extract session info from args
- info = json_tokener_parse (request->post);
+ info = json_tokener_parse (request->post->data);
if (!info) {
response = jsonNewMessage (AFB_FATAL,"sndcard=%s session=%s invalid json args=%s", request->plugin, name, request->post);
goto OnErrorExit;
// info is a valid AFB_info type
if (!json_object_object_get_ex (info, "jtype", &jtype)) {
- response = jsonNewMessage (AFB_EMPTY,"sndcard=%s session=%s No 'AFB_type' args=%s", request->plugin, name, request->post);
+ response = jsonNewMessage (AFB_EMPTY,"sndcard=%s session=%s No 'AFB_pluginT' args=%s", request->plugin, name, request->post);
goto OnErrorExit;
}
json_object_put (jsonSession);
return response;
}
+
+
+
+
+// Free context [XXXX Should be protected again memory abort XXXX]
+STATIC void ctxUuidFreeCB (AFB_clientCtx *client) {
+
+ // If application add a handle let's free it now
+ if (client->ctx != NULL) {
+
+ // Free client handle with a standard Free function, with app callback or ignore it
+ if (client->plugin->freeCtxCB == NULL) free (client->ctx);
+ else if (client->plugin->freeCtxCB != (void*)-1) client->plugin->freeCtxCB(client);
+ }
+}
+
+// Create a new store in RAM, not that is too small it will be automatically extended
+PUBLIC void ctxStoreInit (int nbSession) {
+ int res;
+ // let's create session hash table
+ res = hcreate_r(nbSession, &sessions);
+}
+
+STATIC AFB_clientCtx *ctxStoreSearch (const char* uuid) {
+ ENTRY item = {(char*) uuid};
+ ENTRY *pitem = &item;
+ // printf ("searching uuid=%s\n", uuid);
+
+ pthread_mutex_lock(&mutexHash);
+ if (hsearch_r(item, FIND, &pitem, &sessions)) {
+ pthread_mutex_unlock(&mutexHash);
+ return (AFB_clientCtx*) pitem->data;
+ }
+ pthread_mutex_unlock(&mutexHash);
+ return NULL;
+}
+
+// Reference http://stackoverflow.com/questions/25971505/how-to-delete-element-from-hsearch
+void ctxStoreAdd (AFB_clientCtx *client) {
+ ENTRY item = {client->uuid, (void*)client};
+ ENTRY *pitem = &item;
+
+ pthread_mutex_lock(&mutexHash);
+ if (hsearch_r(item, ENTER, &pitem, &sessions)) {
+ // printf ("storing uuid=%s\n", client->uuid);
+ pitem->data = (void *)client;
+ }
+ pthread_mutex_unlock(&mutexHash);
+}
+
+void ctxStoreDel (AFB_clientCtx *client) {
+ ENTRY item = {client->uuid};
+ ENTRY *pitem = &item;
+
+ pthread_mutex_lock(&mutexHash);
+ if (hsearch_r(item, FIND, &pitem, &sessions)) {
+ pitem->data = NULL;
+ }
+ pthread_mutex_unlock(&mutexHash);
+}
+
+// Check if context timeout or not
+STATIC int ctxStoreToOld (const void *k1, int timeout) {
+ int res;
+ AFB_clientCtx *ctx = (AFB_clientCtx*) k1;
+ time_t now = time(NULL);
+ res = ((ctx->timeStamp + timeout) <= now);
+ return (res);
+}
+
+// Loop on every entry and remove old context sessions
+PUBLIC int ctxStoreGarbage (struct lh_table *lht, const int timeout) {
+
+ if (verbose) fprintf (stderr, "****** Garbage Count=%d timeout=%d\n", lht->count, timeout);
+
+
+}
+
+// This function will return exiting client context or newly created client context
+PUBLIC AFB_error ctxClientGet (AFB_request *request, AFB_plugin *plugin) {
+ static int cid=0;
+ AFB_clientCtx *clientCtx=NULL;
+ const char *uuid;
+ uuid_t newuuid;
+ int ret;
+
+ if (request->config->token == NULL) return AFB_EMPTY;
+
+ // Check if client as a context or not inside the URL
+ uuid = MHD_lookup_connection_value(request->connection, MHD_GET_ARGUMENT_KIND, "uuid");
+
+ // if UUID in query we're restfull with no cookies otherwise check for cookie
+ if (uuid != NULL) request->restfull = TRUE;
+ else {
+ request->restfull = FALSE;
+ uuid = MHD_lookup_connection_value (request->connection, MHD_COOKIE_KIND, COOKIE_NAME);
+ };
+
+ // Warning when no cookie defined MHD_lookup_connection_value may return something !!!
+ if ((uuid != NULL) && (strnlen (uuid, 10) >= 10)) {
+ int search;
+ // search if client context exist and it not timeout let's use it
+ printf ("search old UID=%s\n", uuid);
+ clientCtx = ctxStoreSearch (uuid);
+
+ if (clientCtx && ! ctxStoreToOld (clientCtx, request->config->cntxTimeout)) {
+ request->client=clientCtx;
+ return;
+ }
+ }
+
+ // we have no session let's create one otherwise let's clean any exiting values
+ if (clientCtx == NULL) clientCtx = calloc(1, sizeof(AFB_clientCtx)); // init NULL clientContext
+ uuid_generate(newuuid); // create a new UUID
+ uuid_unparse_lower(newuuid, clientCtx->uuid);
+ clientCtx->cid=cid++; // simple application uniqueID
+ clientCtx->plugin = plugin; // provide plugin callbacks a hook to plugin
+ clientCtx->plugin; // provide plugin callbacks a hook to plugin
+
+ // if table is full at 50% let's clean it up
+ // if(clientCtxs->count > (clientCtxs->size / 2)) ctxStoreGarbage(clientCtxs, request->config->cntxTimeout);
+
+ // finally add uuid into hashtable
+ ctxStoreAdd (clientCtx);
+
+ // if (ret < 0) return (AFB_FAIL);
+
+ if (verbose) fprintf (stderr, "ctxClientGet New uuid=[%s] token=[%s] timestamp=%d\n", clientCtx->uuid, clientCtx->token, clientCtx->timeStamp);
+ request->client = clientCtx;
+
+ return (AFB_SUCCESS);
+}
+
+// Sample Generic Ping Debug API
+PUBLIC AFB_error ctxTokenCheck (AFB_request *request) {
+ const char *token;
+
+ if (request->client == NULL) return AFB_EMPTY;
+
+ // this time have to extract token from query list
+ token = MHD_lookup_connection_value(request->connection, MHD_GET_ARGUMENT_KIND, "token");
+
+ // if not token is providing we refuse the exchange
+ if ((token == NULL) || (request->client->token == NULL)) return (AFB_FALSE);
+
+ // compare current token with previous one
+ if ((0 == strcmp (token, request->client->token)) && (!ctxStoreToOld (request->client, request->config->cntxTimeout))) {
+ return (AFB_SUCCESS);
+ }
+
+ // Token is not valid let move level of assurance to zero and free attached client handle
+ return (AFB_FAIL);
+}
+
+// Free Client Session Context
+PUBLIC AFB_error ctxTokenReset (AFB_request *request) {
+ int ret;
+ AFB_clientCtx *clientCtx;
+
+ if (request->client == NULL) return AFB_EMPTY;
+
+ // Search for an existing client with the same UUID
+ clientCtx = ctxStoreSearch (request->client->uuid);
+ if (clientCtx == NULL) return AFB_FALSE;
+
+ // Remove client from table
+ ctxStoreDel (clientCtx);
+
+ return (AFB_SUCCESS);
+}
+
+// generate a new token
+PUBLIC AFB_error ctxTokenCreate (AFB_request *request) {
+ int oldTnkValid;
+ const char *ornew;
+ uuid_t newuuid;
+ const char *token;
+
+ if (request->client == NULL) return AFB_EMPTY;
+
+ // if config->token!="" then verify that we have the right initial share secret
+ if (request->config->token[0] != '\0') {
+
+ // check for initial token secret and return if not presented
+ token = MHD_lookup_connection_value(request->connection, MHD_GET_ARGUMENT_KIND, "token");
+ if (token == NULL) return AFB_UNAUTH;
+
+ // verify that presented initial tokens fit
+ if (strcmp(request->config->token, token)) return AFB_UNAUTH;
+ }
+
+ // create a UUID as token value
+ uuid_generate(newuuid);
+ uuid_unparse_lower(newuuid, request->client->token);
+
+ // keep track of time for session timeout and further clean up
+ request->client->timeStamp=time(NULL);
+
+ // Token is also store in context but it might be convenient for plugin to access it directly
+ return (AFB_SUCCESS);
+}
+
+
+// generate a new token and update client context
+PUBLIC AFB_error ctxTokenRefresh (AFB_request *request) {
+ int oldTnkValid;
+ const char *oldornew;
+ uuid_t newuuid;
+
+ if (request->client == NULL) return AFB_EMPTY;
+
+ // Check if the old token is valid
+ if (ctxTokenCheck (request) != AFB_SUCCESS) return (AFB_FAIL);
+
+ // Old token was valid let's regenerate a new one
+ uuid_generate(newuuid); // create a new UUID
+ uuid_unparse_lower(newuuid, request->client->token);
+ return (AFB_SUCCESS);
+
+}
+
Code Review / src / app-framework-binder.git / blobdiff